Well, it may be true that the Labour leader has little reason to fear being attacked by a marauding mob of Rabbis. We Jews are a peaceable bunch and culturally abhor violence. But Corbyn's lack of action in the face of relentless examples of anti-Semitism within the party has raised a toxic suspicion: could it be that doing nothing doesn't actually hurt his position that much?

From Bob Campbell, an activist with the militant, Corbyn-supporting Momentum movement, whose Facebook timeline contained a picture of a rat with the Star of David, plus the slogan: "The real plague", to Vicky Kirby, the vice-chairman of the Labour Party in Woking, who posted on Twitter that Jews have "big noses" and like to "slaughter the oppressed."

Vicki Kirby's now-deleted TweetsCredit:
Twitter

Meanwhile on campus, always a cauldron of hard-Left activism, anti-Semitism has found a forum too. At Oxford University, the co-chairman of the Labour Club, Alex Chalmers (who is not Jewish) resigned in February claiming that a "large proportion" of the party’s undergraduate members have "some kind of problem with Jews".

Around the same time, Rayhan Uddin, a Labour student activist at the London School of Economics, wrote a Facebook post complaining that "leading Zionists" were secretly plotting to take over the student Union.

In fairness Corbyn has publically criticised all forms of anti-Semitism, while John McDonnell, the Shadow Chancellor, has said that any members found guilty of anti-Semitism should be banned for life. And it's unfair to tarnish everyone with hard-Left views as an anti-Semite.

That said, it's also hard to forget that Corbyn has shared a platform in the Commons with Dyab Abou Jahjah, a Lebanese-born fanatic who has been banned from Britain. Or that the Labour leader has described rabidly anti-Jewish Islamist militant organisations Hamas and Hezbollah as "friends".

Yet Corbyn's default position of beard-stroking reflection in the face of allegations of party anti-Semitism can only raise suspicion. That either it doesn't hurt, or that doing something about it could create a fault line in his support.

As a Jew who lives in Britain, I want to see Jeremy Corbyn – the Leader of Her Majesty's Most Loyal Opposition and the man who four years from now will be asking me to make him the next prime minister – make a strident public example of party perpetrators.

“It is hard to underestimate the damage being done to the Labour Party. I am disturbed by those who have criticised those of us who have spoken out."

Wes Streeting MP

I want him to roar like a warrior at those who dare defame the party. I want him to organise rallies declaring anti-Semitism is not in Labour's name. But I fear that won't happen. Thanks to Corbynmania, the Labour Party has attracted around 200,000 hard-Left activists, among which are those who may indeed hold hostile views towards Jews.